User blog comment:Letztes/Vivillon Patterns/@comment-27248965-20180301095919

I honestly never thought that someone would be able to figure out how Vivillon patterns are decided, the only clue revealed by Developers is that it is dependent on Player ID, nothing else is leaked. Anyway, Poke Ball and Fancy Patterns are not available in PBB as of now because they are event-exclusive in core series games.